Thrashing and separating device



OCI. 13, 1931. T, .DUGAN 1,826,752

THRASHING AND SEPARATING DEVICE Filed Nov. 2, 1929 me/nto i ZWMJ jagd. v

Patented Oct. 13, 1.931'k l "vTHoMAsDUGnYNmE bENyEn, comnAno,y AssrGNonfOF ONEAIF'T RQERI'LL., 'isENJAMIN DAvIs on rvvrcmmni,l iznvsfis 1: i

'inmsHINe AND sE'rAnAmin'G nnvrcnyvfg g infinit-.entameNovember 2, i929.. serialY ira/404,292.;

This' inventionvrelates to improvements in thrashers of l thev type employed for thrashfv ,ingl vand separatingv grainof kinds,y and has Vreference more particularly to .improvements .55 inthat type of'thrash'er that'is employed in connection" With Combined Iharvesters i and th'rashers.. 1 l y. p.

Thrashing machinesof enlands have here; 1 Y tofore been provided withv rotating cylinders f 10 that are providedfwith,a'large number-'of n teeth "and 'vvhichferefiadapted yto rotate at a high speed.y (They have' also Vbeen provided inderkcan pass between theteeth of theY con- W'ithconcaves located adjacent; theouter surface of the cylinder 'andlp'rovvded with teeth. that extend towards the 'rotating' cylinder and arespaced sothattheteeth of the cyl` caves Withoutlactually comin'gg, in contact therewith.Y Such thrashers have heenfound l x tobe. objectionable foi,` several reasonsar'nong Y .Which may `bef mentioned vth'effact 'that owing fbe a minimumA to. the. Highspeed 'atwhich"j the cylinderimu'st be rotated, it" absorbs `an 'unre'asorial'jly large f aniountfof ypovver andwhenrthe machine is used for thrashinglegumes suchjas-beans and'peasQthe high speed .of rotation; ynearly' alwayscracks them and'. ltherefore f reduces the gradeand,eonsequentlyftheprice at K' thethrashedlegumes*must besold; "i

It is an object of this invention to produce Aa Y thra'shingy mechanism K that f can readily be employedin Y placeiof' the usual cylinder' and concave ofthe ordinary thrashinf ,Jr devices 'and Whichsllall be so constructed that it'v'vill operate at avery moderate speed .Whereiby'the power'neeessaiy'for perating the same Will riality voff-sprocketrvvldieels, or the like, thatfa're correspondingly placed on .the two shafts so each-pairv offvsphicliy an endless'sprocket chain is adapted to cooperate. .The sprocket lchains have secured to them transversely extending n y I `v 4same plane and are'iadapted lto beengage'd by' thesp'rocket chains 8'. Encirclingfthe shafts c 5 and 6 and the sprocket Wheel? is athrasher-V bars Whoseouter surfaces are provided'vvith diagonal"y corrugations; located beneath the n y tirent, esente-d',deities-q 1in', athrafshingdevice comprising `tvc/o spaced f `sl 1afts,"ea`ch of vWhichfiis. provided withA a plu'V` and vvhich are yprovided on their upper sur: faces Vwith transverse ycorrugations,v vory which are otherwise jroughened."Y The f 'concavesj 'separated` grainy may passe injfa manner which will plained- Having thuis-:briefly:described the invenL the preferred form ofthe invention hasl heen outerY-,surfac'e'of the'thrasherbelt; l

uppersurfacejof the concavesy* Fig. 6 isaviewsimilar,tothatshovvnf'in lhereinafter .be more 1 fully-y en-f f Fig; 4-is a View showing-aiportion ofthe (Fig, 5 isa vievv showing a portioneoff Fig-hand shows smooth concavesinterposed f f between the corrugatedfcocaves'; andf ,f nu Fig.'7 isa fragmentary viewshovving apor-V tion. Oia ConcaYe constrllted 'Ofhetvy screenvr material. f w K ,n

. In fther Vdrawingsfreferen*ce l' f resent-stile frame Workofga thrashingima-fv chine that is supported on vvheelsQ and-'Which is provided at its front end Withl a single sup-` fporting Wheel' 3. Secured to the famevlfisf d v`abo'dyor'housing'1i-Which haslloeendiag'gramfl f Inatically indicated on the dravvingsfas. itis 'y 'not my intention to gointo detailsjconcern ingthe' constructionfof theparts thatgdoenot n cooperatewith my improved mechanisms;k

Insteadof the ordinary',toothedcylinder "if jan'dfconca've, Ihav'eprovidedt-Wo spaced parn allel shafts and 6. These shafts'fare eachf ,A lprovidedwith*two or@ more Ysprockets.vvheelsl f "7, vvvhi'chfare .soarranged 'that the'corresponde I ing/sprocketWheels` ofeach shaft are in 'the'f tion, the same W1ll now be {describedin .de-'J c tail, and forthis purpose reference will lhe :had to the. accompanying drawings in which f yspaced sprocket chains 8 that are connected by means of bars 9, which will be referred to as the cylinder bars because they correspond in function to the bars of the rotating cylinders. Each of the cylinder bars are provided with corrugations 10 that extend diagonally across their outer surfaces in the manner shownin Fig. t. A canvas or other dexible member 11 ils secured to the sprocket chains and to the cylinder bars so as to form a iez'- ible wall that prevents straw and other mashaft f derneath the frame members 12 near the rear ends thereof. This shaft carries au eccentric 18 for each of the frame members, and is provided at `one end with a lever or handle 19 that can be reached from the out-l side and by means of which shaft 17 and cams 18 can be rotated. AVVhe'neverthe shaft and cams are rotated, ther frame members 12 will be moved either towards or away from the thrasher belt in a manner quite obvious liust described iian'ges that engage from the drawings.v vThe adjusting means is illustrative of means'for liusting the distance between the thrasher belt and the concave frames 'and may be replaced by any other suitable mechanism that is adapted forthis purpose. Secured to Athe upper surfaces of the fra-mc members 12 are several sections of coricaves which have been designated by reference numeral 20. rllhese concaves may be made' of castiron or of any other suitable material and are provided on their upper surfaces 'with transverse 'corrugations 21. In' the drawings, Eigs'. 3 5 and 6, these corrugations have been shown as eX- tending atrrig'ht angles to thelongitudinal axes'ofthe concave, but may be inclined with respect to this axis if desired.- 1n between the separate Corrugations, openings22 have been provided. These openings maybe circularas shown or may be longitudinal slots of such sizeand shape that the grain can pass through them after it has been separated. The several c'o'ncavcs are spaced apart by -ineans yof bars 23 which have overhanging the enges of the concaves in the manner shown in Fig. 3. 1f it is found that the grain or the legumes are being cracked or otherwise dama-ged by having the entire frame surface covered with concaves as shown in Fig. 5, every other concave can be removed and replaced by a smooth foraminated concave like that indicated by referthat it can be rotatedV ence numeral 24. The concave sections that are supported on the straight portions of frame members 12 are flat while the correspending concaves supported on the curved portions 12 are transversely curved in the manner shown Fig. 1. The curved portions 111 are provided on their concave surfaces with spaced bars or with a foraminated culri'fed member' 25. inthe' manner also" shown in Fig. 1. Thel housing 4: has a downwardly extendingV pa "tition 26 near the rear of the i'ear'inost roland the top of the housing is provided with an opening 27 near the front end. The grain or legumes to be thrashed are introduced into themachine through the opening 27 which may belocated in the top as shown or inthe side whichever is found to be the most suitable. The thrasher belt is moved in the direction indicated bythe arrow and'this will move the material to bethrashed forwardly and then downwardly into lthe space betweenV the belt and the concaves where the action of'the corrugati'ons 10 and the corresponding corrugations 21 will sub-v ject the material to a rubbing aGt-cnthat will separatc'the vQ ra'in orthe legumes from :the heads lorpods.` After the grain or legume have been sepa-rated they will jpass down'- wardly throughthe vopenings 22 onto thegrain pan 28 which is reciprocated by, suitable means andwhichvcarries the gram onto the sieve 29 where it is subjected to the action of a blast of air produced the rotating fan 30. The grain or legumes will fall `down on the inclined` surface 31 and lwill pass from thence to the transverse conveyor 32' which removes them from the mach`ne to a suitable elevator notvshow'ni By means of the adjustment which has been described -and ,which Vis formed in partl by cams 18, it is possible to separate the concave surfaces from ,the surfaces ofthewthrasher belt so as to prevent the breakage of the grain or legumes andso as tOxget the most desirable results.`

f'lhe'concaves instead of having corrugations in the manner shown may be provided with roughened surfaces of almost any speciiic construction as, `for example, semispherical projections maybe substituted for the ccrrugations with good results.;

ln Fig. 7l have showna modified form of concave in which a woven wire-screen 33 is substituted "for the foraminated corrugated concaves shown in Fig. 5. f v Owing to the fact thatv the` machine above described provides a long passage f-for the .grain or other material during whichit `is i i 15326352. i

Inv the attached drawings I have shown an embodiment that is intended as illustrativeof my inventionand I do not Want to be limited to the eXact construction shown in the drawings and described in this specificationto' any greater extent than is made necessary by the state of the prior art.

' Having described my invention What-I claim as new is:

*A concave for use with a thrashing ydevice l. y I comprislng, a frame comprising two" spaced t parallel fraineimembers- Whose` center portions are straight, ap-lurality of concave sec- Y tions secured to the top of the frame, each sec-f` tion having its upper surface provided With yspaced parallel ribsextending in the direc-V l tion of the length of the framethe spaces between the ribs lbeingperforated, one end,v Y

of the frame being supported von al stationary pivot and the other being supported on ro'-, tatable cams that serve as means for adjust-l f ing the position vof the frame ina-,vertical direction. Y Y f Y In testimony vwhereof I aiX my signature.

vTHOMAS DUGrAN. l 

